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  1. NIFS Series
  2. NIFS Report

Experiments of an Intense H- Ion Beam Acceleration

http://hdl.handle.net/10655/2455
http://hdl.handle.net/10655/2455
9c84c3a6-84a5-4ddd-9ffa-0dce0ca46691
Item type 研究報告書 / Research Paper(1)
公開日 2010-02-05
タイトル
タイトル Experiments of an Intense H- Ion Beam Acceleration
言語 en
言語
言語 eng
キーワード
言語 en
主題Scheme Other
主題 Negative hydrogen ion source
キーワード
言語 en
主題Scheme Other
主題 NBI
キーワード
言語 en
主題Scheme Other
主題 High current density
キーワード
言語 en
主題Scheme Other
主題 Beam divergence
キーワード
言語 en
主題Scheme Other
主題 Beam deflection
キーワード
言語 en
主題Scheme Other
主題 Beam intersection with grids
キーワード
言語 en
主題Scheme Other
主題 Stripping loss of H^-.
資源タイプ
資源タイプ識別子 http://purl.org/coar/resource_type/c_18ws
資源タイプ research report
アクセス権
アクセス権 metadata only access
アクセス権URI http://purl.org/coar/access_right/c_14cb
著者 "Ando, A.

× "Ando, A.

en "Ando, A.

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Takeiri, Y.

× Takeiri, Y.

en Takeiri, Y.

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Kaneko, O.

× Kaneko, O.

en Kaneko, O.

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Oka, Y.

× Oka, Y.

en Oka, Y.

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Tsumori, K.

× Tsumori, K.

en Tsumori, K.

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Asano, E.

× Asano, E.

en Asano, E.

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Kawamoto, T.

× Kawamoto, T.

en Kawamoto, T.

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Akiyama, R.

× Akiyama, R.

en Akiyama, R.

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Kuroda, T."

× Kuroda, T."

en Kuroda, T."

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抄録
内容記述タイプ Abstract
内容記述 "An intense H^- beam of a single beamlet is extracted from a large multicusp plasma source operated with cesium seeding. The H^- beams are accelerated up to 100keV by a single-stage or a two-stage electrode system. Spatial profiles of the beams are measured calorimetrically and a minimum beam divergence angle of 5mrad is achieved at a H^- current density of 30mA/cm^2 with a beam energy of 100keV. A ratio of an acceleration current to a H^- current increases abruptly when a H^- current saturates in the space charge limited region. This enhancement is mainly due to secondary electrons caused by the intersection of H^- beams with an extraction grid. When an operating gas pressure decreases, the ratio of the acceleration current to the H^- current decreases. This is related to a stripping loss of H^- ions in the electrodes. A beam divergence angle becomes minimum when a ratio of V_acc to V_ext is set at a optimum value of I .6 in the single-stage acceleration. This ratio is almost the same as that in the double-stage acceleration, where the optimum ratio of E_accl/E_ext is I .5. In the optimum E_accl/E_ext ratio the divergence angle is not affected by V_acc2. The divergence angle can be reduced by changing V_acc2 even if the ratio of E_accl/E_ext is not optimized. The beam steering effect by permanent magnets buried in an extraction grid is observed in nine beamlets experiments. A simple calculation of a single particle trajectory gives a good approximation of the beam deflection angle."
書誌情報 en : Research Report NIFS-Series

発行日 1995-08-01
報告書番号
NIFS-369
ISSN
収録物識別子タイプ ISSN
収録物識別子 0915-633X
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Cite as

"Ando, A., Takeiri, Y., Kaneko, O., Oka, Y., Tsumori, K., Asano, E., Kawamoto, T., Akiyama, R., Kuroda, T.", 1995, Experiments of an Intense H- Ion Beam Acceleration.

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